On a day when the whole world seems to be falling apart – Greece is about to explode, the Dow is going up and down thousands of points a day, that Icelandic volcano is blowing up again – it’s nice to have some simplicity. Like this whole Arizona debacle. Angry ranchers shooting at Mexicans with rifles, the protection of our national industry, Los Suns, it can seem crazy. But it’s not. Actually, it could be explained by a six-year old.